You'll ended up getting a love song from Seth Rogen, who is giving away the world's most caring Ukulele!

Seth Rogen is giving away the world’s most caring Ukulele—and he’s promising to sing a love song to one lucky fan who donates to the cause closest to his heart.

He's not the only one giving it some love, as Paul Rudd, Ty Burell and Aziz Ansarisigned the mini-guitar at Hilarity for Charity’s first annual fundraiser earlier this year benefiting the Alzheimer’s Association, a charity dedicated ending the disease that has had a huge impact on Rogen’s life.

Both his grandmother and mother-in-law have Alzheimer’s.

To win, all you have to do is donate $26 or more!

The winner will be invited to respond with his or her own uke video tribute to Seth, which Seth has agreed to tweet out to his followers.

So cool! We are SO excited to be able to share all this information with you guys!!